EP3121831A1 - Elektrische erdungsschalteranordnung für gasisolierte unterstation - Google Patents

Elektrische erdungsschalteranordnung für gasisolierte unterstation Download PDF

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Publication number
EP3121831A1
EP3121831A1 EP15178135.8A EP15178135A EP3121831A1 EP 3121831 A1 EP3121831 A1 EP 3121831A1 EP 15178135 A EP15178135 A EP 15178135A EP 3121831 A1 EP3121831 A1 EP 3121831A1
Authority
EP
European Patent Office
Prior art keywords
contact
sliding
earth
housing
contacts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15178135.8A
Other languages
English (en)
French (fr)
Other versions
EP3121831B1 (de
Inventor
Thomas SIKORSKI
Lukas Treier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
General Electric Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Technology GmbH filed Critical General Electric Technology GmbH
Priority to EP15178135.8A priority Critical patent/EP3121831B1/de
Priority to KR1020187004800A priority patent/KR102632133B1/ko
Priority to PCT/EP2016/067369 priority patent/WO2017013195A1/en
Priority to CN201680043250.0A priority patent/CN107851533A/zh
Publication of EP3121831A1 publication Critical patent/EP3121831A1/de
Application granted granted Critical
Publication of EP3121831B1 publication Critical patent/EP3121831B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0352—Gas-insulated switchgear for three phase switchgear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/075—Earthing arrangements

Definitions

  • the invention relates to an electric earthing switch to be mounted in a gas insulated substation to electrically connect electric lines of this substation to the earth.
  • an electric line to be connected to the earth comprises typically one or three bus bars which are mounted in a leak-proof casing filled with dielectric gas such as SF6.
  • This switch comprises an actuating mechanism to allow connection and disconnection of the bus bars which are in the enclosure of the casing, to an earth connector of the substation which is out of this enclosure since it is not insulated with dielectric gas.
  • the switch comprises a particular casing or housing which is mounted on the line to surround its bus bars.
  • This casing or housing of the switch is then necessarily a part of the main casing of the line allowing proper alignment of the components of the switch with the bus bars.
  • the switch Since the line contacts of the switch are in the enclosure insulated with dielectric gas, and since the earth connector of the substation is not insulated with gas, the switch comprises additional electrically insulating means which carry contacts and/or moving parts rendering its design complex.
  • the goal of the invention is to provide an electric earthing switch which is compact and easy to mount to allow a modular design of a gas insulated substation.
  • the invention relates to an electric earthing switch for a gas insulated substation, to connect at least one line conductor of the substation to the earth, this switch comprising:
  • the actuating mechanism is very compact, with a diameter not wider than the outer diameter of the flange, and a height corresponding mainly to the height of the sliding contacts increased with the length of their moving path.
  • the invention also relates to an electric earthing switch as defined above, comprising a plurality of sliding earth contacts and a plurality of fixed earth contacts, an insulating beam to rigidly secure the sliding earth contacts to each other, the actuating mechanism moving the insulating beam to move the sliding earth contacts together upon actuation.
  • each line contact comprises a tulip line contact
  • each sliding earth contact comprises a pin which is inserted in the corresponding tulip line contact when the earthing switch is in closed position.
  • the invention also relates to an electric earthing switch as defined above, wherein each sliding earth contact is carried by a corresponding fixed earth contact by means of an intermediate electrically insulating sleeve, and wherein each fixed earth contact carries a tulip through which the sliding contact passes to ensure electric connection between the sliding earth contact and the fixed earth contact.
  • the invention also relates to an electric earthing switch as defined above, comprising an electric connecting part securing the outer portions of the earth contacts together out of the housing.
  • the electric earthing switch 1 according to the invention seen in figure 1 comprises a main insulating plate 2 which is generally circular, and which carries three line contacts 3a, 3b, 3c.
  • the example of the figures is a three phase electric earthing switch, but the invention applies also to a single phase or other kinds of multiple phase earthing switch.
  • This earthing switch 1 comprises three corresponding earth contacts 4a, 4b, 4c which can be in contact with the corresponding line contacts 3a, 3b, 3c when the switch is closed as in figures 1 and 2 , or disconnected from these line contacts when the switch is open as in figure 3 .
  • first line contact 3a and the first earth contact 4a are described in more details with their components and parts having each a reference sign comprising letter "a" as suffix. Since the second and third contacts have the same parts as components, the corresponding parts for the second line contact 3b and second earth contact 4b are implicitly designated by the same reference sign having letter "b" as suffix instead of "a”. The corresponding parts for the third line contact 3c and third earth contact 4c are implicitly designated with the same reference sign having letter "c" as suffix instead of "a”.
  • the first line contact 3a comprises a tulip contact 5a and an insert portion 6a with a thread bolt 7a which passes through the insulating plate 2 to be electrically connected to a corresponding line conductor of the gas insulated substation to which the earthing switch is to be installed.
  • the tulip 5a with its shielding part is fixed to the corresponding insert portion 6a by means of a standard thread bolt 7a.
  • the line contacts 3a, 3b, 3c extend each according to a direction AX which is perpendicular to the insulating plate 2.
  • the earth contact 4a is made of a fixed earth contact generally designated by 8a, and a sliding earth contact generally designated by 9a.
  • the fixed earth contact 8a comprises a main conductive arm 11a carried by a support 12a comprising a fixation plate 13a and an insulating part 14a passing through this insulation plate.
  • the conductive arm 11a passes through the insulating part 14a, and thus passes through the fixation plate 13a.
  • the arm 11a with the support 12a comprising the fixation plate 13a and the insulating part 14a are all rigidly secured to each other, forming a same single element.
  • the arm 11a passes through holes of the wall of the housing 16 of the switch, the fixation plate 13a being at the outer face of this wall and secured to it by screws or the like.
  • the fixed earth contact 8a comprises an outer portion corresponding to the outer extremity of the arm 11a and the support 12a, and an inner portion corresponding to the main part of the arm 11a with its inner extremity.
  • the three outer extremities of the three arms 11a, 11b and 11c are electrically connected by an earthing plate 17 secured to these arms by bolts 10a, 10b and 10c or the like, this earthing plate 17 being electrically connected to the earth.
  • the three main arms 11a, 11b and 11c extend parallel to each other and parallel to the insulating plate, i.e. perpendicularly to the direction AX of the line tulip contacts 3a, 3b and 3c.
  • the inner extremity of the arm 11a of the fixed earth contact 8a which is its free end, carries the corresponding earth sliding contact 9a which extends parallel to the AX direction, i.e. perpendicular to this arm.
  • This sliding contact 9a comprises a main pin 18a passing through a corresponding opening in the extremity of the arm 11a to slide into it.
  • An electrically insulating sleeve which is not visible in the figures, is mounted in this opening of the arm 11a, the pin 18a sliding into this insulating sleeve to ensure that electric current cannot weld the pin 18a to the arm 11a.
  • a tulip contact 19a rigidly secured to the arm 11a and surrounding the pin 18a provides electric connection between the pin 18a and the arm 11a for any position of the sliding contact 9a.
  • the pin 18a has a contacting end which faces the tulip contact 3a in the open position as in figure 3 , and which has an appropriate shape to be inserted into this tulip contact when the switch is closed as in figures 1 and 2 .
  • the three pins 18a, 18b and 18c which are parallel to the direction AX have each their end which is opposite to their contacting end, which passes through a same insulating beam 21 which is perpendicular to the pins 18a, 18b, 18c and perpendicular to the arms 11a, 11b, 11c.
  • the pins 18a, 18b, 18c are rigidly secured to the insulating beam 21 by bolts in order to form together a same mechanical element which can be actuated to slide parallel to direction AX between the open position and the closed position.
  • the actuating mechanism which is generally marked as 22 comprises a main shaft 23 extending parallel to the direction of the main arms 11a, 11b, 11c and which is carried by the housing 16 to be able to be rotated.
  • This main shaft 23 is connected to the insulated beam 21 by means of a first cam 24 rigidly secured to this shaft 23, and a second cam 26 having an extremity secured to the free end of cam 24 and a second extremity secured to a lug 27 which is rigidly secured to the beam 21.
  • the first cam 24 and the second cam 26 and also the lug 27 extend both parallel to a plane comprising the three pins 18a, 18b, 18c, and move each into a plane parallel to this plane.
  • the linkage composed of the first and second cam transforms the rotation of the shaft into a translation of the sliding contacts along direction AX. Since this linkage is connected to the insulating beam 21, the actuation mechanism is insulated from the sliding contacts and from the line contacts.
  • the actuation mechanism 22 is mounted in an inner compartment 28 of the housing 16 with the other components of the switch, i.e. the inner parts of the fixed earth contacts 8a, 8b and 8c, the sliding contacts 9a, 9b, 9c and the line contacts 5a, 5b, 5c.
  • This inner compartment 28 is separated from the compartment of the line by the insulating plate 2.
  • This actuation mechanism is driven by a driving mechanism mechanically connected to the shaft 23 to rotate it clockwise or anticlockwise in order to open or close the switch.
  • the drive mechanism is located in an outer compartment 29 of the housing 16, the shaft 23 passing through an internal wall of the housing to protrude into this outer compartment 29 which is contiguous to the inner compartment 28, and which is dedicated to the drive mechanism.
  • the housing 16 comprises a main circular flange 31 with appropriate holes to be secured to a flange of a compartment enclosing the lines to be earthed, the circular insulating plate 2 being gripped between the flange 31 of the housing and the flange of the compartment.
  • the flange surrounds the main opening of this housing, i.e. the part or opening which is mounted against the insulating plate 2. Apart from this main opening, the housing comprises mainly several much smaller holes to receive the earth contacts, but not any other opening as great as this flange.
  • This flange 31 extends perpendicular to the orientation AX of the sliding contacts 9a, 9b, 9c, and it delimits the contour of the main opening of this housing 16.
  • the sliding contacts extend perpendicular to the flange 31 and the plate 2, facing the corresponding tulip contacts 5a, 5b, 5c, and the fixed earth contacts 8a, 8b, 8c extend parallel to the flange 31, passing through the wall of the housing to protrude out of this housing, as seen in figure 4 .
  • the installation of the electric earthing switch according to the invention can be achieved on any standard flange of a casing enclosing electric lines. It requires to open the said flange, to secure plugin contact parts 15a, 15b, 15c to the bus bars, then to apply the insulating plate 2 and to screw the thread bolts 7a, 7b, 7c in order to secure the plugin contact parts 15a, 15b, 15c to the insert portions 6a, 6b, 6c carried by this insulating plate 2. Depending on the situation, the insulating plate 2 with its threaded bolts 7a, 7b, 7c secured to existing plugin contact parts 15a, 15b, 15c can be already present in the existing compartment.
  • the line contacts 5a, 5b, 5c can be installed by screwing and tightening them to the thread bolts 7a, 7b, 7c. Then, the housing 16 carrying the fixed earth contacts and the sliding earth contacts can be installed with its flange 31 against the insulating plate 2.
  • the earthing plate 17 which is at the outer face of the housing can be electrically connected to a connection to the earth of the gas insulated substation.
  • the earthing switch together with its drive mechanism according to the invention is very compact with a simple design.
  • the earthing switch comprises the main switch in a first gas insulated compartment with an insulating plate carrying the line contacts and a metallic housing carrying all the other parts and having a flange to be secured to the insulating plate against the corresponding flange of the casing of the line and a drive mechanism in a second compartment outside insulating gas, all said compartments being in the same housing.
  • the installation of the earthing switch is very simple, allowing it to be easily adapted onto an existing gas insulated substation comprising a casing with a flange providing access to the lines to be connected. It allows a very modular setup of the components in the gas insulated substation since it can be installed on almost any standard flange of the substation, on every insulating plate, barrier of open type, with standard fixation points.
  • the system can be mounted without loosing time in aligning the conductors and contacts.
  • This earthing system is particularly adapted for a make-proof earthing switch.
EP15178135.8A 2015-07-23 2015-07-23 Elektrische erdungsschalteranordnung für gasisolierte unterstation Active EP3121831B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15178135.8A EP3121831B1 (de) 2015-07-23 2015-07-23 Elektrische erdungsschalteranordnung für gasisolierte unterstation
KR1020187004800A KR102632133B1 (ko) 2015-07-23 2016-07-21 가스 절연 변전 설비를 위한 전기 접지 스위치 장치
PCT/EP2016/067369 WO2017013195A1 (en) 2015-07-23 2016-07-21 Electric earthing switch arrangement for gas insulated substation
CN201680043250.0A CN107851533A (zh) 2015-07-23 2016-07-21 用于气体绝缘变电站的电接地开关

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15178135.8A EP3121831B1 (de) 2015-07-23 2015-07-23 Elektrische erdungsschalteranordnung für gasisolierte unterstation

Publications (2)

Publication Number Publication Date
EP3121831A1 true EP3121831A1 (de) 2017-01-25
EP3121831B1 EP3121831B1 (de) 2017-09-13

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EP15178135.8A Active EP3121831B1 (de) 2015-07-23 2015-07-23 Elektrische erdungsschalteranordnung für gasisolierte unterstation

Country Status (4)

Country Link
EP (1) EP3121831B1 (de)
KR (1) KR102632133B1 (de)
CN (1) CN107851533A (de)
WO (1) WO2017013195A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105466818A (zh) * 2015-12-25 2016-04-06 国家电网公司 一种gis中金属微粒运动状况模拟及监测实验平台
US11063410B2 (en) * 2017-06-23 2021-07-13 Mitsubishi Electric Corporation Switchgear

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102042155B1 (ko) * 2019-02-07 2019-11-07 주식회사 에스에이치솔텍 친환경 가스절연 부하개폐기의 접지 스위치 모듈
EP3836182B1 (de) * 2019-12-11 2023-03-08 ABB Schweiz AG Trennschalter mit drei positionen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1544333A (en) * 1976-03-15 1979-04-19 Merlin Gerin Grounding switch for high voltage shielded substation
EP0054726A2 (de) * 1980-12-22 1982-06-30 Karl Pfisterer Elektrotechnische Spezialartikel GmbH & Co. KG Anordnung zur Erdung der stromführenden Teile einer gekapselten Schaltanlage und zur Prüfung der an die Schaltanlage angeschlossenen Kabel
WO2006131560A1 (en) 2005-06-10 2006-12-14 Areva T & D Ag An electric switch having an annular stationary contact
WO2007042548A1 (fr) 2005-10-14 2007-04-19 Areva T & D Ag Sectionneur de terre et procede de fabrication d'un tel sectionneur de terre

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320883A (ja) * 2003-04-15 2004-11-11 Nissin Electric Co Ltd ガス絶縁開閉装置用断路装置
CN203690184U (zh) * 2014-01-22 2014-07-02 浙江盛中意电力科技有限公司 一种电动接地刀装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1544333A (en) * 1976-03-15 1979-04-19 Merlin Gerin Grounding switch for high voltage shielded substation
EP0054726A2 (de) * 1980-12-22 1982-06-30 Karl Pfisterer Elektrotechnische Spezialartikel GmbH & Co. KG Anordnung zur Erdung der stromführenden Teile einer gekapselten Schaltanlage und zur Prüfung der an die Schaltanlage angeschlossenen Kabel
WO2006131560A1 (en) 2005-06-10 2006-12-14 Areva T & D Ag An electric switch having an annular stationary contact
WO2007042548A1 (fr) 2005-10-14 2007-04-19 Areva T & D Ag Sectionneur de terre et procede de fabrication d'un tel sectionneur de terre
US20090120909A1 (en) * 2005-10-14 2009-05-14 Areva T & D Ag Grounding Disconnector and a Method of Manufacturing Such a Grounding Disconnector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105466818A (zh) * 2015-12-25 2016-04-06 国家电网公司 一种gis中金属微粒运动状况模拟及监测实验平台
CN105466818B (zh) * 2015-12-25 2018-10-30 国家电网公司 一种gis中金属微粒运动状况模拟及监测实验平台
US11063410B2 (en) * 2017-06-23 2021-07-13 Mitsubishi Electric Corporation Switchgear

Also Published As

Publication number Publication date
CN107851533A (zh) 2018-03-27
KR20180031716A (ko) 2018-03-28
EP3121831B1 (de) 2017-09-13
WO2017013195A1 (en) 2017-01-26
KR102632133B1 (ko) 2024-01-31

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